用所给词的适当形式填空。

1. When              the car             (invent)?

2. What do you think              (be ) the most helpful invention?

3. A stranger was seen              (go) into the teacher's office by the girl.

4. Knocking into players and falling down would be              . (danger)

5. I am              (save) my money so I can buy a new bicycle.

6.             (be) a volunteer is great.

7. I fix up bikes and give               (they)away to children.

8. I love places where the people are really              (friend)

9. I love singers              (whom) write their own music.

10. Teenagers should              (allow) to choose their own clothes.

关于公司发行普通股和债券的说法。正确的有（）。

A.发行债券的资金成本大于发行普通股的资金成本 

B.发行债券会提高公司的负债比率，发行普通股会降低公司的负债比率 

C.相对于发行普通股而言，发行债券会降低公司所缴纳的所得税 

D.发行债券会使原有股东控制权降低，而发行普通股不会影响原股东控制权 

E.发行债券会增大公司的融资风险，发行普通股会降低融资风险